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Operation and Maintenance
Envistar Flex
DSEF191101.05.EN
Continuous product development may give rise to specification changes without notice.
Cleaning
DANGER!
Risk of serious personal injury and/or damage to air handling
unit.
Read and understand the entire chapter "1.5 General safety
messages" before working on, servicing, or inspecting the air
handling unit.
• Remove dust by carefully vacuum cleaning using a soft brush.
• If the rotor surfaces are severely fouled by greasy dust, spray the rotor with
water mixed with a dishwashing detergent that will not corrode aluminium.
Alternatively, use detergent designed for heat exchangers, e.g. Re-Coilex
(see below).
• Compressed air at low pressure (max. 6 bar) can be used for blowing the
surfaces clean. To avoid damage, the nozzle should not be held any closer to
the rotor than 5–10 mm.
A hygroscopic rotor variant can absorb particles which in some cases give off
odours. To prevent odours arising, exercise run the hygroscopic rotor using the
integrated control function. If an odour persists, we recommend cleaning the
rotor with a mild, alkaline detergent.
For cleaning it is recommended that the purge sector is fully open and the
rotational speed is 8 rpm as this assists with the suction of the detergent. Post-
rinsing is not normally required.
Lubrication
The bearings and drive motor are permanently lubricated and do not require
additional lubrication.